Governor of India's central bank expresses for the first time: Interest rate tools may be used to defend the currency

The Reserve Bank of India is combating rupee short positions by tightening liquidity in the banking system. For the first time, the central bank governor has publicly suggested that interest rate policy could become part of the monetary defense toolkit, causing markets to price in a significantly higher risk of future rate hikes.

According to Bloomberg on Wednesday, Reserve Bank of India Governor Sanjay Malhotra previously stated that monetary policy can sometimes be used to address financial stability risks. When asked whether interest rates might become part of the central bank’s toolkit for defending the exchange rate, he said this is a topic the rate-setting committee "will definitely consider and discuss." This is the clearest public statement yet from Reserve Bank of India officials linking exchange rates and interest rates.

Beyond policy signals, the market is already feeling substantial tightening pressure. Overnight interbank lending rates have been pushed up to near the upper end of the central bank’s policy corridor. Three and six-month certificate of deposit rates rose about 40 to 50 basis points last week, reaching a seven-month high. The rise in bank funding costs has begun to pass through to non-bank financial institutions.

According to Bloomberg Economics Research Index, excess liquidity in India’s banking system fell sharply from a record high of around 1.1 trillion rupees (about $116 billion) in early September to 462 billion rupees as of October 26—a contraction of over 95%.

The direct trigger for this shift was a series of broad-based interventions by the Reserve Bank of India at the beginning of this month, as the rupee approached all-time lows. Since then, the central bank has deliberately limited the scale of liquidity injections, capping support at 150 billion rupees and refusing to provide additional funds on days when market demand exceeded supply.

Analysts from IDFC First Bank and Emkay Global Financial Services both expect these tight funding conditions to persist, noting that the Reserve Bank of India is in no rush to fully replenish banking system liquidity.

Emkay’s chief economist Madhavi Arora stated, "This liquidity tightening appears to be intentional." She pointed out that the Reserve Bank of India’s moves are aimed at raising rupee hedging costs, making it more expensive for traders to borrow rupees and buy dollars, thereby curbing speculative attacks against the rupee.

The higher cost of borrowing directly narrows the arbitrage opportunity: Tighter liquidity pushes up overnight rates, driving up short-term financing costs and increasing the cost of shorting the rupee. This logic aligns with the latest statements from the central bank governor regarding the use of interest rate tools.

The impact of liquidity tightening is spreading to a wider range of funding markets. Surging certificate of deposit rates mean banks’ own funding costs have risen significantly, which could further raise the bar for non-bank financial institutions seeking financing.

Ajay Manglunia, Executive Director of non-bank lender Capri Global Capital, said, "There is significant uncertainty around the direction of interest rates now, but if the macro environment remains unchanged and oil prices continue to rise, investors will demand higher risk premiums. The borrowing cost curve could steepen further."

For market participants, the core issue is whether the central bank’s liquidity tightening is merely a tactical, short-term move or the start of a longer-term policy trend. Malhotra’s public comments have undoubtedly increased the probability of the latter scenario.